Shikaku


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Shikaku (also known as Rectangles) is a logic puzzle with simple rules and challenging solutions.

The rules are simple. You have to divide the grid into rectangular and square pieces such that each piece contains exactly one number, and that number represents the area of the rectangle.

Click and drag to draw a rectangle. To remove lines use the right mouse button or hold the Ctrl or the Shift key.

Video Tutorial
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Shikaku


5x5 Shikaku | 7x7 Shikaku | 10x10 Shikaku | 15x15 Shikaku | 20x20 Shikaku | 25x25 Shikaku

New Puzzle
This Month
1. miggy
172
 00:05.56
2. oli g
36
 00:05.91
3. zuhnaie
18
 00:07.04
4. GavinRose
15
 00:07.15
5. magarner
70
 00:07.16
6. vilodi
145
 00:07.32
7. willy86ylliw
71
 00:07.64
8. Dorice
275
 00:07.86
9. hgh
75
 00:08.36
10. qobi
243
 00:08.38
11. GeorgPfleger
102
 00:08.49
12. Oryn
197
 00:08.87
13. Jackh 00:08.96
14. Tabby_<3
40
 00:09.27
15. Meerkat
221
 00:09.30
16. mts55
48
 00:10.15
17. larpllama 00:11.31
18. wallickdeez
31
 00:11.89
19. Mieppert 00:12.10
20. dirkdiggler 00:12.64
This Week
1. zuhnaie
18
 00:07.04
2. vilodi
145
 00:07.32
3. willy86ylliw
71
 00:07.64
4. hgh
75
 00:08.36
5. GeorgPfleger
102
 00:08.65
6. Oryn
197
 00:08.87
7. Jackh 00:08.96
8. qobi
243
 00:09.65
9. magarner
70
 00:10.26
10. Mieppert 00:12.10
11. Hahllyicssa
53
 00:15.46
12. Tuffi
37
 00:18.85
13. Lucifer9927
9
 00:18.93
14. DBWzhoulvchen
4
 00:20.71
15. Houston1617 00:23.93
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Today
1. willy86ylliw
71
 00:07.64
2. GeorgPfleger
102
 00:11.30
3. Houston1617 00:23.93
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5.--- empty -----:--
6.--- empty -----:--
7.--- empty -----:--
8.--- empty -----:--
9.--- empty -----:--
10.--- empty -----:--
11.--- empty -----:--
12.--- empty -----:--
13.--- empty -----:--
14.--- empty -----:--
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20.--- empty -----:--
MO3
1. zahhydude1
219
 00:03.48
2. vowels
216
 00:03.81
3. demian2
61
 00:04.66
4. Vicellen
15
 00:04.70
5. numbrr
327
 00:04.92
6. coolcoolguy65
182
 00:04.93
7. BingBongBob
108
 00:05.15
8. JZE
88
 00:05.16
9. nabi
92
 00:05.27
10. mtanzer
140
 00:05.34
AO5
1. zahhydude1
219
 00:03.76
2. vowels
216
 00:03.88
3. demian2
61
 00:04.92
4. Vicellen
15
 00:05.06
5. numbrr
327
 00:05.32
6. BingBongBob
108
 00:05.39
7. nabi
92
 00:05.41
8. coolcoolguy65
182
 00:05.44
9. bearn
207
 00:05.55
10. JZE
88
 00:05.75
AO12
1. zahhydude1
219
 00:04.20
2. vowels
216
 00:04.91
3. BingBongBob
108
 00:05.84
4. coolcoolguy65
182
 00:05.85
5. Vicellen
15
 00:06.24
6. numbrr
327
 00:06.26
7. demian2
61
 00:06.31
8. JZE
88
 00:06.39
9. bearn
207
 00:06.41
10. Chalk
138
 00:06.73
Robots / programmatic solversinfo  
1.dbut2
51
00:00.003
2.tlstyer
157
00:00.006
3.Charlie Li
61
00:00.207

* MO3 - Mean of 3. The average of 3 consecutive times.
AO5 - Average of 5. The average of 5 consecutive times ignoring the highest and the lowest.
AO12 - Average of 12. The average of 12 consecutive times ignoring the highest and the lowest.
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